Notes: Production: 07/01/1998-, For models produced between 08/1999-07/2000, there were two different intake manifold gaskets. California only models used intake manifold gasket # 17177-75030, which is NOT included in this set. Federal models used intake manifold gasket # 17177-75020, which IS included in this set. If you have a California only model, you must purchase 17177-75030 separately. Intake valve stem seals: Metal: Brown Rubber: Brown Spring: Black Exhaust valve stem seals: Metal: Brown Rubber: Black Spring: Silver